The Collaborative International Dictionary of English v.0.48:

Reviviscent \Rev`i*vis"cent\, a. [L. reviviscens, p. pr.
   ofreviviscere to revive; pref. re- re- + viviscere, v. incho.
   fr. vivere to live.]
   Able or disposed to revive; reviving. --E. Darwin.
   [1913 Webster]